Stepper Motors

[asid61]

Originally Posted by Andrew Schreiber

I'll be honest, I've spent some time trying to source a brushless motor for some non FRC projects and it's mildly daunting to find a motor and a controller. And then interfacing with them is a whole other issue (though I've found one that I can press fit WCProducts pinions (for bag motors) onto and do decent reductions)

I don't know, I've never had that problem. ESCs for standard brushless motors seem pretty easy to come by once you know what you're looking for. I'll second the gear problem though; you tend to have to use set screws or press fits to keep stuff on the shaft.
SDP-SI sells "fairloc" hubs for their gears, which are like integrated shaft collars that allow you to leave the shaft unmarred. Something like that would be good for interfacing a brushless motor.